The BBC reported that the masks began selling out in Seattle, where the first reported case of coronavirus was reported in the U.S.
The outlet said other cities like New York, Washington D.C. and Los Angeles have had similar reports.
CORONAVIRUS OUTBREAK: MONGOLIA CLOSES CHINA BORDERThe virus has killed 80 people in China and infected thousands, sending authorities scrambling to contain the outbreak.
Five cases have been reported in the U.S. American health officials said there are 110 people under investigation across 26 states as the outbreak continues.
All passengers will be screened for coronavirus symptoms before being allowed to depart China.